CN103477133A - Low gain pressure relief valve for a fluid pump - Google Patents
Low gain pressure relief valve for a fluid pump Download PDFInfo
- Publication number
- CN103477133A CN103477133A CN2012800169682A CN201280016968A CN103477133A CN 103477133 A CN103477133 A CN 103477133A CN 2012800169682 A CN2012800169682 A CN 2012800169682A CN 201280016968 A CN201280016968 A CN 201280016968A CN 103477133 A CN103477133 A CN 103477133A
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- wall
- decompression valves
- outlet
- valve body
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- 239000012530 fluid Substances 0.000 title claims description 44
- 238000005266 casting Methods 0.000 claims abstract description 6
- 239000007769 metal material Substances 0.000 claims abstract description 6
- 230000006837 decompression Effects 0.000 claims description 151
- 238000005461 lubrication Methods 0.000 claims description 14
- 239000003921 oil Substances 0.000 description 84
- 230000000750 progressive effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 230000003042 antagnostic effect Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 238000007726 management method Methods 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010705 motor oil Substances 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002459 sustained effect Effects 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003305 oil spill Substances 0.000 description 1
- 239000008041 oiling agent Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/16—Controlling lubricant pressure or quantity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/8667—Reciprocating valve
- Y10T137/86694—Piston valve
- Y10T137/8671—With annular passage [e.g., spool]
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Details Of Reciprocating Pumps (AREA)
- Valve Housings (AREA)
Abstract
AA pressure relief valve (10) includes a casted, metal material housing (20) including a passage (16) therein along a longitudinal axis (X) and inlet and outlet ports (12, 13, 14) substantially perpendicular to the longitudinal axis, the outlet port having a wall (18) at an angle less than perpendicular to the longitudinal axis wherein and at a draft angle of the casting of the housing (20). The housing includes a counterbore (17) at the intersection of the wall of the passage and the wall of the outlet port (14) to provide a counterbore surface that is substantially perpendicular to the wall of the passage around the outer circumference of a valve body (30) in the passage. The top end (32) of the valve body (30) includes a reduced diameter portion (44) and a tapered portion (45) between the reduced diameter portion and the top of the valve body.
Description
The cross reference of related application
The application requires to submit on March 31st, 2011 at this, name is called " LOW GAIN PRESSURE RELIEF VALVE FOR A FLUID PUMP(is for the low gain Decompression valves of fluid pump) ", invention people is that Matthew Williamson, sequence number are No.61/470, the preference of 403 U.S. Provisional Patent Application; And on April 28th, 2011, submit to, name is called " LOW GAIN PRESSURE RELIEF VALVE FOR A FLUID PUMP(is for the low gain Decompression valves of fluid pump) ", invention people is that Matthew Williamson, sequence number are No.13/096, the preference of 560 the non-temporary patent application of the U.S., the full content of these applications is incorporated in herein for benefit and purpose.
Technical field
The disclosure relates generally to a kind of oil pump assembly, and this oil pump assembly comprises for the low gain Decompression valves at motor management oil pump discharge pressure.More particularly, the disclosure relates to the Decompression valves that has special application in a kind of pump of the lubrication system in the explosive motor of vehicle.
Background technique
Usually be known that a kind of explosive motor that comprises the oil pump assembly is provided, this oil pump assembly is lubricated engine components with the various lubrication channels by motor (usually also be called path and jointly be called engine oil path) for the oil pump for engine warp let-off is crossed to motor.Be known that: have by engine-driven oil pump, and fuel pump speed changes according to the speed of motor.It is also known that providing a kind of has the oil pump assembly of the device such as Decompression valves to be adjusted in oil pump assembly and in-engine pressure.Decompression valves is also for generally being conducive to management in any other application of the fluid overvoltage of specific assembly or application.At the motor for vehicle, thereby usually be known that the use Decompression valves meets the oil pressure limit of motor to regulate discharge pressure during power operation, and attempt to provide the energy management for oil pump.
For the pump of incompressible fluid---such as oil---normally gear pump, gerotor or vane pump, but it can be any known or suitable type.In the environment such as car engine lubrication system, when oil pump is attached to motor and travels with the speed identical with power operation speed, oil pump will operate in wide velocity range.In this application, fuel pump speed changes due to the output volume oily and the variation aspect delivery pressure.The change speed because engine lubrication system can be modeled as the aperture of fixed dimension and pump according to the service speed of pump, so this is accurate especially, along with engine speed increases, the outlet pressure of oil pump will increase.Usually, along with power operation speed increases, motor needs lubricating oil pressure to increase to maximum pressure levels from the pressure minimum level, but, before motor reaches its maximum service speed, has usually obtained oil pressure maximum demand or desirable.Therefore, usually, along with power operation speed and fuel pump speed increase (that is, oil pressure continues to increase), at a time, oil pump will provide over the power operation velocity range overlubricate oil greatly.Simultaneously, the loss of oil can cause the infringement to engine components, and the oil of overvoltage is also undesirable.For example, oil pressure is too high can be damaged the paper filter element and have other undesirable effects on motor, and can cause excessive kinetic equation loss.
In order to prevent or limit the oil of overvoltage in system and motor, the common known Decompression valves that comprises for lubrication system.In order to control this overfeeding and in order to control otherwise can damage the overvoltage of the result of engine components, undesirable part that constant discharge pump in this environment is provided with the oil that allows overfeeding usually is back to oil groove or fuel tank or is back to the Decompression valves of the entrance of oil pump, thus the lubrication system that makes the desirable volume of fluid only and desirable pressure be supplied to motor.Decompression valves is connected with oil pump and motor and the oil discharge is back to when when oil pressure, reaching the limit presetted in oil groove to the suction side of oil pump (, be disposed to).A kind of Decompression valves of known type is in U.S. Patent No. 6,116, is disclosed in 272, and wherein, Decompression valves is integrated in oil pump.Decompression valves comprises the piston be positioned in cylindrical channel or hole, and piston is setovered along a direction (that is, towards closed position) by spring.Be supplied to a side (that is, a side contrary with the bias force that is applied to piston or spring force) of piston from the compressed oil of oil pump outlet, and compressed oil antagonistic spring and urge piston.Along with engine revolution is faster, oil pump also rotates faster and work is more difficult, and oil pressure increases.Because oil pressure increases, the piston antagonistic spring in Decompression valves and move, and move to following point in hole: make exhaust port permission oil spill stream on the edge at piston be back to the entrance of oil groove or pump at this some place.Use the oil pressure Decompression valves of this general type, the oil pump outlet pressure is for judging when oily Decompression valves will open internally to get around the high pressure oil that is back to the suction side of oil pump from the waste side of oil pump.Such typical oil pressure Decompression valves will be set as being suitable for the preheating setting pressure level of specific engines and application and open.
Although this conventional oil pressure Decompression valves is simple and reliably, known restriction and shortcoming are that the kinetic equation loss to oil pump has adverse influence and makes kinetic equation loss relative higher.The fuel efficiency that the high kinetic equation loss of oil pump is equivalent to reduce, this is significant shortcoming all the time.
In a known application, such as being disclosed in U.S. Patent No. 6,481, in the application in 458, the Decompression valves assembly comprises the tap hole for the gradual shape of the oil pressure Decompression valves of the lubrication system of motor.This example in addition is disclosed in U.S. Patent No. 7,775,503.Especially, the U.S. 6,481, the open and teaching of 458 documents be formed on the decompression inflow section on an end of valve chest; And the decompression discharge portion at neutral position place that is formed on the valve path of valve chest, and comprise aperture section and the macropore section communicated with each other that form.The decompression discharge portion is provided with aperture section in the side near decompression inflow section.Yet, in some cases (such as because the valve spring power at the aperture position place in having the Decompression valves of a plurality of operation pressures is relatively low, such as when pilot pressure is supplied to Decompression valves), this hole shape has defect, and this is stain resistance (due to the particulate in oil) due to valve little particle sizes in some of compromising.For example, this little particulate can occur from sand-cast, or other pollutants in oil can occur from the foundry goods of the metal shell for Decompression valves or oil pump case, and Decompression valves must be with lower pressure setting effect relatively, such as in thering is the oil pump systems of pump, selectable outlet pressure is described and is that the name of submitting on September 20th, 2005 is called " pump that Pump With Selectable Outlet Pressure(has selectable outlet pressure) ", in the document W02006032132A1 that the invention people is Matthew Williamson, the full content of the document is incorporated in herein.In selectable pressure oil pump and lubrication system, it is desirable to that Decompression valves is had to relatively lower operation pressure to reduce energy loss.Yet, in this system, Decompression valves must operate with lower spring force, this lower spring force makes valve be easier to be subject to pollute and disturbs.Similarly problem is useful in the system of oil pump assembly and the closed-loop feedback control of using Decompression valves---such as using pilot-actuated valve---.Reduce the conventional method of valve gain, such as progressive opening (overflowing) window shape, enough do not proved and support resistant to pollution robustness in Decompression valves when using in conjunction with relatively low spring force.
Retain the remarkable needs to the low gain Decompression valves for managing better the small particle pollution problem, and avoided interference and self sustained oscillation.Therefore, retained being for the remarkable needs of the solution that can manage satisfactorily and/or eliminate the good robustness that realizes controllable low gain decompression and keep the opposing small particle to pollute contacting between valve body and housing when valve while opening.
Summary of the invention
In a kind of illustrative embodiments, the fluid lubricant (oil) of the pressurization that a kind of Decompression valves used in pump (oil pump) assembly uses in the motor for being provided at vehicle (such as automobile) is disclosed.Especially, have special practicability together with the application of Decompression valves and selectable delivery pressure oil pump and the Decompression valves used in being included in motor, wherein, Decompression valves is with relatively low pressure operation, such as using pilot valve.In a kind of illustrative embodiments, the present invention relates to a kind of device as the low gain Decompression valves.Decompression valves comprises the valve chest with passage or hole, and this passage or hole comprise the wall with an end, and the passage of Decompression valves defines the longitudinal axis of valve and valve chest.Valve chest includes an inlet and an outlet, and at least outlet has to be less than the first wall that the wall of 90 degree and passage intersects.Decompression valves also comprises the valve body be positioned in passage, valve body comprises piston portion, piston portion has at least one outer circumferential portion of the wall for engaging passage, this piston also comprises top and bottom, valve body slides or is mobile in passage, make when valve body is positioned at primary importance or closed position, at least one outer circumferential portion has stopped the entrance of valve chest, and when valve body moves away from closed position fully, the entrance of valve chest is no longer stopped by piston portion but is communicated with outlet, make the fluid (such as oil) of the entrance that enters Decompression valves circulate by passage and discharge from outlet.
Decompression valves also comprises biasing member---such as spring---and with for valve body is setovered enduringly towards primary importance or closed position.Entrance allow fluid enter valve body piston portion top so that the bias force of valve body opposing biasing member move, thereby be enough to resist biasing member and during mobile piston section when the pressure of the fluid that is supplied to entrance increases to, entrance is connected with outlet with for discharging fluid from passage and making fluid from exporting out.In a kind of illustrative embodiments, valve chest comprises the undercutting counterbore of the first wall infall of the wall that is located at passage and outlet.Counterbore comprises the first counterbore surface, in the plane that this first counterbore surface is vertically aimed at and vertically aimed at the wall of passage at the longitudinal axis with valve body, extend, the plane that makes the first counterbore surface is not the plane identical with the first wall of outlet, but is the plane of angle with respect to the first wall of outlet.
In a kind of illustrative embodiments, valve chest is cast in mould by metallic material, and the first wall of outlet has draft angle.More particularly, the draft angle of the first wall of outlet is less than about five degree, and more particularly is less than approximately twice.In a kind of special mode of execution, the draft angle of the first wall of outlet is about 1.5 degree, and the first wall that makes outlet equals apart from the angle of longitudinal axis the angle that 90 degree deduct 1.5 degree, but the first counterbore surface is substantially perpendicular to longitudinal axis.
In another illustrative embodiments, fluid (oil) oiling agent of the pressurization that a kind of low gain Decompression valves used in fluid pump (oil pump) assembly uses with the motor for being provided at vehicle (such as automobile) is disclosed.In a kind of illustrative embodiments, the present invention relates to a kind of device as the low gain Decompression valves, this low gain Decompression valves comprises the housing with passage or hole, and this passage or hole comprise the wall with end, and wherein, the hole of Decompression valves defines the longitudinal axis of valve.Valve chest includes an inlet and an outlet, and the first wall that intersects of the wall of at least one outlet angle of having to be less than 90 degree and passage.Decompression valves also comprises the valve body be located in hole, valve body comprises valve piston, valve piston has at least one the outer circumferential portion for the wall of conjugate foramen, and valve piston also comprises top and bottom, valve piston slides or is mobile in passage, make when valve body is positioned at primary importance or closed position, at least one outer circumferential portion has stopped the entrance of valve chest, and when valve piston moves away from closed position fully, the entrance of housing is no longer stopped by valve piston, but be communicated with hole and outlet, make the fluid of the entrance that enters the low gain Decompression valves circulate by hole and discharge from outlet.
A kind of low gain Decompression valves of mode of execution also comprises biasing member, such as spring, with for making valve body towards primary importance or closed position.The top that entrance allows the fluid of pressurization to enter piston increases to while being enough to make the piston antagonistic spring to move and makes the bias force of piston antagonistic spring and move with the pressure of convenient fluid, thereby entrance and passage are connected with for from passage discharge fluid with exporting.In a kind of illustrative embodiments, valve piston comprises the first reduced diameter portion towards the top of valve piston, and this first reduced diameter portion circumferential portion from least one is extended towards piston head; And comprise convergent section, this convergent section extends towards the top of piston from the first reduced diameter portion.
In a kind of illustrative embodiments, Decompression valves is included in the piston in hole, and wherein, the hole in housing comprises for creating the counterbore of the edge of opening/surface interface vertical with the axis of Decompression valves.When valve is that this has almost eliminated valve and all contact near between the housing of tap hole while opening, with in the situation that do not use the tap hole shape of progressive size to realize low gain, thus the good robustness that has kept the opposing small particle to pollute.
In a kind of illustrative embodiments, a kind of low gain Decompression valves and system for using in the fluid lubrication system at explosive motor disclosed, this explosive motor has the oil pump that the lubrication system for fluid (fluid of hydraulic pressure, such as oil) being run through to motor is circulated.Decompression valves and system comprise the Decompression valves with housing, and this housing has in ，Gai hole, hole and has piston and define longitudinal direction.Decompression valves also comprises the relief spring for piston is setovered along first direction in hole.Decompression valves also comprises: entrance, and this entrance for example, moves for allowing fluid to enter the power that hole arrives a side (, high pressure side) of piston (that is, in contrast to) relief spring so that the piston opposing from the high pressure side of fluid lubrication system; Outlet, this outlet is moved so that entrance is communicated with fluid is discharged from hole with outlet for the spring force of having resisted increase once piston.In a kind of illustrative embodiments of the present invention, the low gain Decompression valves comprises piston, and this piston has the outer circumferential surface of aiming at and engaging with the surface sliding in hole with the surface in hole.The outer circumferential surface of piston extends to the end of piston skirt usually from the top of piston.
In alternate embodiments of the present invention, depressurized system comprises the pilot valve for the assisted decompression system except the low gain Decompression valves.In this embodiment, Decompression valves also comprises pressure entrance, and this pressure entrance allows fluid to enter in the hole of Decompression valves and pilot valve pressure is applied to piston along the direction of the hydrodynamic pressure opposite direction with from entrance to Decompression valves.In a kind of alternative mode of execution of the present invention, Decompression valves comprises the pilot valve for the assisted decompression system except the low gain Decompression valves.In alternative mode of execution, the present invention relates to a kind of oil pump that comprises the low gain Decompression valves.In alternative mode of execution, the present invention relates to a kind of motor that comprises oil pump, this oil pump comprises the low gain Decompression valves.
The accompanying drawing explanation
Fig. 1 is the partial cross section figure of Decompression valves that shows the engine oil pump-unit of prior art.
Fig. 2 is the partial cross section figure shown according to the Decompression valves of the oil pump for engine that comprises bold box of one embodiment of the present invention, and wherein, Decompression valves is in the closed position.
Fig. 3 is the partial cross section figure of the Decompression valves that has removed piston that shows the mode of execution of Fig. 2.
Fig. 4 is the planimetric map according to the piston of the Decompression valves of the mode of execution of Fig. 2.
The partial enlarged drawing of the piston that Fig. 5 is Fig. 4.
The partial cross section figure of the Decompression valves of the mode of execution that Fig. 6 is Fig. 2, wherein, Decompression valves moves towards open position from closed position.
The partial cross section figure of the Decompression valves of the Decompression valves of the mode of execution that Fig. 7 is Fig. 2 and the mode of execution of Fig. 1 from closed position (a) to the mobile progressive action in the position (g) of opening fully.
Fig. 8 is the formula that is defined in the valve gain in Decompression valves.
The plotted curve of the gain comparison chart of the Decompression valves of the Decompression valves that Fig. 9 is Fig. 1 (prior art) and the mode of execution of Fig. 2 (low gain mode of execution).
The partial cross section figure of the Decompression valves that Figure 10 is Fig. 1 (prior art) that the interval between piston and housing has been described in detail in detail, wherein, Decompression valves moves towards open position from closed position.
Figure 11 is the partial cross section figure of Decompression valves of mode of execution that the Fig. 2 at the interval between piston and housing has been described in detail in detail, and wherein, Decompression valves moves towards open position from closed position.
The partial cross section figure of the Decompression valves that Figure 12 is Figure 10 (prior art) that the interval between piston and housing has been described in detail in detail, wherein, Decompression valves moves towards the open position that includes the image streamline from closed position.
Figure 13 is the partial cross section figure of Decompression valves of mode of execution that the Figure 11 at the interval between piston and housing has been described in detail in detail, and wherein, Decompression valves moves towards the open position that includes the image streamline from closed position.
Figure 14 is the partial cross section figure of Decompression valves that the mode of execution of the radially spaced Fig. 2 between piston and housing has been described in detail in detail, and wherein, Decompression valves moves towards open position from closed position.
That Figure 15 is the mode of execution according to Fig. 2 and use the partial cross section figure of the Decompression valves that the alternative technique of undercutting counterbore manufactures.
Figure 16 is for having the partial cross section figure of the Decompression valves of many diameter piston according to alternative mode of execution.
That Figure 17 is the mode of execution according to Fig. 2 and use the partial cross section figure of the Decompression valves that machining manufactures, wherein, cutter enters from sidepiece.
Embodiment
Generally with reference to institute's drawings attached, particularly with reference to Fig. 2, disclose a kind of new design for low gain Decompression valves 10, this low gain Decompression valves 10 is for having special practicability use the oil pump assembly (not shown) at the motor (not shown) of vehicle (not shown) such as those in and in the oil pump especially for the motor (not shown) in the passenger car (not shown).Although the Decompression valves 10 illustrated has special practicability at the oil pump assembly for motor, should be understood that, Decompression valves of the present disclosure can have application in the similar application that comprises other known or suitable application and environment.
Low gain Decompression valves 10 comprises valve chest 20, and this valve chest 20 has valve channel or the hole 16 of longitudinally extending in valve chest 20.Valve chest 20 can be made for the one-piece element of oil pump assembly, and as the situation of the mode of execution shown in Fig. 2, or valve chest 20 can alternately be made for the oil pump assembly and separates with the oil pump (not shown).Valve chest 20 is made and is made for metal (such as aluminium or the magnesium) parts of casting usually by metallic material.Low gain Decompression valves 10 and passage 16 also define longitudinal center's axis " X ", as shown in dotted line in the accompanying drawings.Low gain Decompression valves 10 has inlet channel or entrance 12 and outlet passage or exports 14, as understood in correlation technique.In one embodiment, thus low gain Decompression valves 10 can have additional passage or mouthful---such as guide's inlet channel or first introducing port 13---with for connecting with the pilot valve (not shown) for variable or a plurality of pressure, operating Decompression valves.
In the mode of execution of Fig. 2, low gain Decompression valves 10 comprise the valve body that is arranged in passage or hole 16 or piston 30(as at Fig. 4 and Fig. 5 is best illustrates), low gain Decompression valves 10 comprises first piston or lower piston 34, central neck or intermediate portion 35 and the second piston or the upper piston 37 in the hole 16 that also is located at housing 20.Valve body or piston 30 also comprise at least one outer circumferential portion 31, and this at least one outer circumferential portion 31 is as the part of lower piston 34, and lower piston 34 at least one outer circumferential portion 31 of comprising top 32, bottom 33 and being arranged in the hole 16 of housing 20.As Fig. 2, Fig. 3 and Fig. 6 the best illustrate, hole 16 can be along the vicissitudinous diameter of length tool of Decompression valves 10.Therefore, hole 16 upper end 19(is referring to Fig. 6) there is the diameter of comparing different (reducing) from the diameter of the central part in hole 16 and bottom.
The housing 20 of Decompression valves 10 is preferably manufactured by the die-cast metal material, as everyone knows.The housing 20 of Decompression valves 10 comprises entrance 12 and outlet 14, and this entrance 12 and outlet 14 form in having the mould (not shown) of the direction of edge shown in 6 and the draft angle Z that plane was become perpendicular to axis X during the casting of housing 20.Draft angle Z is corresponding to outlet 14 at least first wall 18, but typically corresponding to entrance 12, first introducing port 13 with export each wall in 14, as is understood.Therefore, export 14 wall 18 and be angle Z(referring to Fig. 6 with respect to the vertical direction of longitudinal axis X with Decompression valves 10).Reaffirm that a hole 16 makes in housing 20 along the axis X of housing 20.Wall 18 is and is equivalent to the angle that 90 degree deduct the Z degree with respect to the wall in axis X and hole 16.In one embodiment, draft angle Z is less than five (5) and spends or be approximately 5 degree.More particularly, draft angle Z is less than twice or is approximately two (2) degree, and in one embodiment, draft angle Z is approximately 1.5 degree (once partly).
In a kind of special mode of execution, the upper end of piston 34 (as observed in Fig. 2, Fig. 4, Fig. 5) and therefore the 32 upper end, close top of at least one outer circumferential portion 31 comprise end difference or forming part.Especially, the upper end of piston 34 comprises reduced diameter portion 44, and the diameter of this reduced diameter portion 44 has reduced amount 2X D, and the upper end of piston 34 have from circumferential portion 31 top or approximately outside the top of circumferential portion 31 towards top 32 axial ranges that extend.Reduced diameter portion 44 is reduced to make at the fluid of Decompression valves 10 or the chip in oil or other pollutants can not to cause the interference of piston 34 and to stick fully, therefore, yet can between the wall due to the hole 16 of pollutant clamping stagnation in reduced diameter portion 44 and housing 20, not cause the interference of the valve body 30 in passage or hole 16 and stick.And reduced diameter portion 44 allows to make the fluid of pressurization to start to be flowing between the wall in reduced diameter portion 44 and hole 16 before piston 34 moves to the position of opening fully.Reduced diameter portion 44 is led to the convergent section 45 of extending between reduced diameter portion 44 and top 32.
Therefore, along with valve body 30 moves towards open position, because reduced diameter portion 44 and convergent section 45 have passed through the end (as shown in Figure 7) of the wall in hole 16 in advance, so the pressure of fluid will reduce slightly, and compare with traditional Decompression valves of Fig. 1, will have the low gain performance of Decompression valves 10.Please note prior-art devices and current disclosed device and modification at Figure 10 to Figure 14 that aspect flowing, (referring to Figure 12 and Figure 13) compares.In order further to present difference, please note Fig. 9, Fig. 9 has drawn the opening area of Decompression valves (Fig. 1 (prior art) and Fig. 2 (low gain mode of execution)) and valve body 30 in 16Nei position, hole (valve position)." gain " calculates with the formula of Fig. 8.The prior art design has the straight line type path for the relation after initial position.Yet decompressor 10 of the present disclosure comparatively speaking has low-down gain about the position of valve body 30.
As shown in Fig. 2, Fig. 3, Fig. 6, Fig. 7 and Figure 11 and Figure 13 to Figure 17, please note " box " position of Fig. 2 (again, should be understood that, " box " is simply for guiding focus and not forming the low gain Decompression valves or any part of the present invention), the central hole of valve chest 20 or intermediate hole 16 preferably include counterbore 17, and this counterbore 17 is positioned at outlet 14 positions of the most close Decompression valves 10 towards the lower end of central hole 16.Similarly, the infall of counterbore 17 between the wall 18 of passage or hole 16 and outlet 14.
In a kind of special mode of execution, counterbore 17 is preferably designed so that the linear extensional surface 17a(had with the Surface Vertical in hole 16 is referring to Figure 11).Undercutting counterbore 17 in the mode of execution shown in Fig. 2 also comprises counterbore rounding 17c and relative sidewall 17b.Although counterbore 17 has as illustrated in the drawings and the shape of describing, and is contemplated that other shapes (combinations of ellipse, curvilinerar figure, lineal shape, fragment and/or these shapes) and the details of counterbore is possible.In addition, discuss as shown in figure 17 and hereinafter, on only side in possible is counterbore 17 can be presented on hole 16.Regardless of the shape of counterbore, the scope of the surperficial 17a of counterbore 17 preferably forms perpendicular to the axis X of the housing 20 of Decompression valves 10 and perpendicular to the surface in hole 16.Undercutting counterbore 17 is in preferably processing or form in the housing 20 at Decompression valves 10 during the manufacture of housing 20, and undercutting counterbore 17 has the shape of extension between the surface 18 of the surface in hole 16 and outlet 14.Although counterbore 17 can be processed in housing 20, such as by drill bit being inserted through entrance or when not having spring or plunger, thereby drill bit being inserted and carries out counterbore drilling operation from the bottom of housing 20, but should be understood that, counterbore 17 can utilize any known or suitable processing or forming technique or operation to be formed in housing 20.For any this alternative or known (or also unknown) technology of wall that counterbore surface 17a and hole 16 are provided, be suitable, wherein, counterbore surface 17a is perpendicular to axis X, and the wall in hole 16 will work for eliminating in hole 16 draft angle Z on every side.For example, please note Figure 17, Decompression valves 10 according to the present invention comprises counterbore 17, and wherein, wall 18 basically is processed into flat (that is, perpendicular to axis X) and only makes on the side of Figure 17 (that is, left side) in the drawings to can be observed undercutting counterbore 17.
In a kind of special mode of execution, as shown in figure 16,16 lower end, hole 16 ' has (or increasing large diameter) lower end 35 of with the main part 36 of the outer circumferential portion 31 of valve body 30, comparing and enlarging.In this embodiment, the lower end 33 of valve body 30 comprises diameter expansion section 35.Similar with the mode of execution of Fig. 2, the upper hole section 19 that the hole 16 between first introducing port 13 and entrance 12 of the Decompression valves 10 of Figure 16 comprises that diameter reduces, make in the top and bottom of the valve body 30 of hole 16 interior slips and have extra stability on the operating range of Decompression valves 10.For the class of operation of the Decompression valves of the mode of execution of the operation of the Decompression valves 10 of Figure 16 and Fig. 2 seemingly, the Decompression valves 10 of Figure 16 comprises undercutting counterbore 17 and the reduced diameter portion on piston 34 44 and convergent section 45, therefore be back to now the progressive diagram of Decompression valves 10 and Fig. 7.
Any numerical value of enumerating in this paper and accompanying drawing is intended to comprise from lower value all values to high value with the form of the increment of a unit, and the increment of a unit is arranged in the interval that has at least two units between any lower value and any high value.As example, if the value of the amount of predetermined member or process variable---for example, temperature, pressure, time etc.---for example from 1 to 90, preferably from 20 to 80, more preferably from 30 to 70, purpose is such as 15 to 85,22 to 68,43 to 51,30 to 32 equivalences are explicitly recited in specification.For being less than 1 value, a unit depends on the circumstances and is considered to 0.0001,0.001,0.01 or 0.1.These are only the examples of specific intended, and all possible combination of the numerical value between the minimum of enumerating and peak is considered to stipulate clearly in a similar fashion in this application.If observe, the teaching that is expressed as in the text the amount of " parts by weight " is also considered same range as in weight percent.Therefore, it is also conceivable that the teaching into the scope of the same reference amount of " final polymer mixed component mark calculates by weight " x " " about the statement of " " x " part that the final polymer mixed component is calculated by weight " in the specific embodiment of the present invention.
Except as otherwise noted, all scopes comprise end points and the numerical value between end points.Be applied to the two ends of scope about the use of " approximately " or " being similar to " of scope.Therefore, " about 20 to 30 " are intended to comprise " about 20 to about 30 ", comprise at least specific end points.
What comprise all articles of patent application and communique and reference openly is passed and quotes and merge for all purposes.The term of describing combination " mainly comprises " should comprise definite element, composition, parts or step, and can not affect in fact the essence of combination and other elements, composition, parts or the step of inven-tive features.The term of describing in the text the combination of element, composition, parts or step " comprises " or the use of " comprising " also considers mainly to comprise the mode of execution of element, composition, parts or step.In the text by term " can " use, purpose be " can " attribute of any description of comprising is selectable.
A plurality of elements, composition, parts or step can provide by single holistic element, composition, parts or step.Alternately, single holistic element, composition, parts or step can be divided into a plurality of elements, composition, parts or the step of separation.The disclosing of " one " or " one " of describing element, composition, parts or step is not intended to get rid of other element, composition, parts or step.
Be understandable that, above describe that to be intended to be illustrative and nonrestrictive.Many mode of executions except the example provided and many application will be obvious reading in above-described situation for a person skilled in the art.Therefore, scope of the present invention should not determine with reference to description above, and the full breadth of the equivalent that alternately should authorize with reference to claims and these claims is determined.Comprise the open merged by reference for all purposes of all articles of patent application and communique and reference.The omission of any aspect in following claim of theme disclosed herein is not to the abandoning of this theme, and should not be considered to this theme that the inventor is not considered as the part of published subject matter.
Claims (17)
1. the device as the low gain Decompression valves, described device comprises:
Valve chest, described valve chest has the passage that comprises wall, described valve chest and described passage define longitudinal axis, described valve chest has entrance and exit, described outlet has first wall, wherein, described passage comprises the end that the described first wall with described outlet intersects, and the described first wall of described outlet and the described wall of described passage are to be less than the angular cross of 90 degree;
Valve body, described valve body is positioned at described passage, and described valve body comprises piston portion, described piston portion has top, bottom and at least one outer circumferential portion, described at least one outer circumferential portion is positioned at first or stop up the described entrance of described valve chest during closed position at described valve body, and described at least one outer circumferential portion is for being positioned at second or the described entrance of described valve chest is connected with described outlet during open position at described valve body;
Biasing member, described biasing member for by described valve body towards described first or closed position, wherein, described entrance allows fluid to arrive the described top of the described piston portion of described valve body, thereby the bias force that makes described valve body resist described biasing member moves and described entrance is connected with described outlet with for described fluid is discharged from described passage; And
Wherein, described valve chest comprises counterbore, described counterbore is positioned at the cross part place of the described first wall of described passage and described outlet, described counterbore comprises the first counterbore surface, described the first counterbore surface is extended on the plane of vertically aiming at the described longitudinal axis of described valve body and vertically aiming at the described wall of described passage, the described plane that makes described the first counterbore surface not in identical plane, but is angle with respect to the described first wall of described outlet with the described first wall of described outlet.
2. device according to claim 1, wherein, the described piston portion of described valve body comprises from described circumferential portion first reduced diameter portion of extending towards the described top of described piston at least one.
3. device according to claim 2, wherein, the described piston portion of described valve body also comprises the convergent section that extends to the described top of described piston from described the first reduced diameter portion.
4. device according to claim 1 and 2, wherein, described valve chest is by the metallic material casting, and the described first wall of described outlet has the draft angles that are less than about five degree.
5. device according to claim 4, wherein, the described first wall of described outlet has the draft angle be less than approximately twice.
6. device according to claim 5, wherein, the described first wall of described outlet has the draft angles of about 1.5 degree.
7. Decompression valves according to claim 4, wherein, the described convergent section of described valve piston has the angle between about 10 degree are spent with about 45.
8. Decompression valves according to claim 7, wherein, the described convergent section of described valve piston has the angles of about 10 degree.
9. Decompression valves according to claim 7, wherein, the described convergent section of described valve piston has the angles of about 45 degree.
10. Decompression valves according to claim 6, wherein, the described piston portion of described valve body also comprises convergent section, the described convergent section of described valve piston has the angle between about 10 degree are spent with about 45.
11. the Decompression valves used in the fluid pump for motor, described Decompression valves comprises:
Housing, described housing has hole and defines longitudinal axis, described valve has entrance and exit, described outlet comprises first wall, wherein, described hole comprises the end that the described first wall with described outlet intersects, and the described first wall of described outlet and the described wall in described hole are to be less than the angular cross of 90 degree;
Valve piston, described valve piston is positioned at described hole, and described valve piston comprises top, bottom and at least one outer circumferential portion, described at least one outer circumferential portion limits the wall of described valve piston, when described valve piston is positioned at first or during closed position, described at least one outer circumferential portion is for the described wall in the described hole that engages described housing and by described entrance and described outlet disconnection, and when described valve piston is positioned at second or during open position, described at least one outer circumferential portion is separated with the described wall in described hole and described entrance is connected with described outlet;
Spring, described spring for by described valve piston along first direction towards described closed position, wherein, described entrance is used for allowing fluid to arrive the described top of described valve piston from the high pressure side of the fluid lubrication system of described motor, thereby described valve piston is moved against the described bias force of described spring; And
Wherein, described valve piston comprises: the first reduced diameter portion, described the first reduced diameter portion from described at least one circumferential portion towards the described top of described piston, extend; And convergent section, the described top extension towards described piston from described the first reduced diameter portion of described convergent section.
12. Decompression valves according to claim 11, wherein, described valve chest is the metallic material of casting, and the described first wall of described outlet has the draft angle that is less than about five degree.
13. Decompression valves according to claim 12, wherein, the described first wall of described outlet has the draft angle be less than approximately twice.
14. Decompression valves according to claim 11, wherein, the described convergent section of described valve piston extends to the described top of described valve piston from described reduced diameter portion, wherein, described convergent section is the angle between about 5 degree are spent with about 60 with respect to the described wall of the described outer circumferential portion of described valve piston.
15. Decompression valves according to claim 14, wherein, the described convergent section of described valve piston has in about 10 degree and the angle between about 45.
16. Decompression valves according to claim 15, wherein, the described convergent section of described valve piston has the angles of about 10 degree.
17. Decompression valves according to claim 15, wherein, the described convergent section of described valve piston has the angles of about 45 degree.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201161470403P | 2011-03-31 | 2011-03-31 | |
| US61/470,403 | 2011-03-31 | ||
| PCT/CA2012/000326 WO2012129679A1 (en) | 2011-03-31 | 2012-03-29 | Low gain pressure relief valve for a fluid pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103477133A true CN103477133A (en) | 2013-12-25 |
| CN103477133B CN103477133B (en) | 2016-01-06 |
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ID=46925997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201280016968.2A Active CN103477133B (en) | 2011-03-31 | 2012-03-29 | For the low gain pressure relief valve of fluid pump |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US8720849B2 (en) |
| JP (1) | JP6088124B2 (en) |
| CN (1) | CN103477133B (en) |
| CA (1) | CA2830989C (en) |
| MX (1) | MX337928B (en) |
| WO (1) | WO2012129679A1 (en) |
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| CN106763948A (en) * | 2017-02-20 | 2017-05-31 | 广西玉柴机器股份有限公司 | Respirator oil return valve |
| CN107300029A (en) * | 2017-08-17 | 2017-10-27 | 湖南机油泵股份有限公司 | Pressure limiting valve |
| CN110185911A (en) * | 2019-07-05 | 2019-08-30 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve preventing plunger eccentric wear |
| CN111006048A (en) * | 2020-02-21 | 2020-04-14 | 湖南机油泵股份有限公司 | Oil pump pressure limiting valve to reduce pressure fluctuations and prevent whistling |
| CN111750161A (en) * | 2020-07-22 | 2020-10-09 | 南安市溪美林英花建筑物清洁服务中心 | Regulating valve opened by liquid pressure control |
| CN111765279A (en) * | 2020-07-06 | 2020-10-13 | 潍柴动力股份有限公司 | Pressure limiting device and engine |
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| CN102966407B (en) * | 2012-11-29 | 2015-06-10 | 长城汽车股份有限公司 | Oil pump and engine using same |
| CN103712046A (en) * | 2013-12-23 | 2014-04-09 | 安徽江淮汽车股份有限公司 | Oil pump with improved pressure release valve |
| US10094349B2 (en) * | 2014-05-08 | 2018-10-09 | Hitachi, Ltd. | Fluid valve assembly |
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| DE102016117607A1 (en) * | 2016-09-19 | 2018-03-22 | Knorr-Bremse Systeme für Nutzfahrzeuge GmbH | Pressure control valve for an air conditioning system of a commercial vehicle |
| JP2022112848A (en) * | 2021-01-22 | 2022-08-03 | 株式会社ミツバ | Relief valve |
| US11661819B2 (en) * | 2021-08-03 | 2023-05-30 | Baker Hughes Oilfield Operations Llc | Valve, method and system |
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| CN110185911A (en) * | 2019-07-05 | 2019-08-30 | 湖南机油泵股份有限公司 | A kind of engine oil pump pressure-limiting valve preventing plunger eccentric wear |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20120248362A1 (en) | 2012-10-04 |
| CN103477133B (en) | 2016-01-06 |
| MX2013011370A (en) | 2014-05-27 |
| US8720849B2 (en) | 2014-05-13 |
| CA2830989C (en) | 2018-01-02 |
| JP6088124B2 (en) | 2017-03-01 |
| JP2012215276A (en) | 2012-11-08 |
| CA2830989A1 (en) | 2012-10-04 |
| WO2012129679A1 (en) | 2012-10-04 |
| MX337928B (en) | 2016-03-23 |
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